DEFINITELY a Black Rock scorpion. look at the distinctive marbled lines on its claws. I have seen them before in the exact same location, the like to hide under rocks, sometimes in a burrow, sometimes not. the tend to be found >80% of the way up the mountain. This one looks like a female, but I'm not 100%
@AlexInTheWild U. manicatus are everywhere in Canberra and a lot of Australia for that matter, one of the most common, if not the most common, scorpion in Australia.
This one is a female, distinguishable from males as they have shorter and wider pectines than males, however they're only noticeable from the ventral surface. The general morphology and colour can help with identifying between males and females too